src/test/test-random-util.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
  This file is part of systemd.

  Copyright 2017 Zbigniew Jędrzejewski-Szmek
***/

#include "hexdecoct.h"
#include "random-util.h"
#include "log.h"

static void test_acquire_random_bytes(bool high_quality_required) {
        uint8_t buf[16] = {};
        unsigned i;

        log_info("/* %s */", __func__);

        for (i = 1; i < sizeof buf; i++) {
                assert_se(acquire_random_bytes(buf, i, high_quality_required) == 0);
                if (i + 1 < sizeof buf)
                        assert_se(buf[i] == 0);

                hexdump(stdout, buf, i);
        }
}

static void test_pseudorandom_bytes(void) {
        uint8_t buf[16] = {};
        unsigned i;

        log_info("/* %s */", __func__);

        for (i = 1; i < sizeof buf; i++) {
                pseudorandom_bytes(buf, i);
                if (i + 1 < sizeof buf)
                        assert_se(buf[i] == 0);

                hexdump(stdout, buf, i);
        }
}

int main(int argc, char **argv) {
        log_set_max_level(LOG_DEBUG);
        log_parse_environment();
        log_open();

        test_acquire_random_bytes(false);
        test_acquire_random_bytes(true);

        test_pseudorandom_bytes();

        return 0;
}